Originally Posted by wikipedia
The Strategic Defense Initiative (SDI) was a proposal by U.S. President Ronald Reagan on March 23, 1983[1] to use ground and space-based systems to protect the United States from attack by strategic nuclear ballistic missiles. The initiative focused on strategic defense rather than the prior strategic offense doctrine of mutual assured destruction (MAD).
Though it was never completely developed or deployed, the research and technologies of SDI paved the way for some anti-ballistic missile systems of today. The Strategic Defense Initiative Organization (SDIO) was set up in 1984 within the United States Department of Defense to oversee the Strategic Defense Initiative. It gained the popular name Star Wars after the 1977 film by George Lucas. Under the administration of President Bill Clinton in 1993, its name was changed to the Ballistic Missile Defense Organization (BMDO) and its emphasis was shifted from national missile defense to theater missile defense; from global to regional coverage. BMDO was renamed to the Missile Defense Agency in 2002. This article covers defense efforts under the SDIO.
Space-related defense research and testing remains heavily-budgeted to this day, irrespective of the program names, operative/reporting organizations, politics, or reports to the contrary in the press. Although it is difficult to compile actual spending totals across the complete spectrum of space-based defense programs (including classified "off-budget" "black projects"), the U.S. has certainly invested well over $100 Billion on "SDI" and follow-on programs, and holds a commanding lead over all current or potential future adversaries in the realm of space technology/warfare. The vast majority of this investment has been made in basic research at National Laboratories and Universities, and these programs continue to be a key source of funding for top research scientists in the fields of high-energy physics, supercomputing/computation, advanced materials, and many other critical science and engineering disciplines: funding which indirectly supports other research work by top scientists, and which would be largely unavailable outside of the defense budget environment.
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